131111130220 has 96 divisors (see below), whose sum is σ = 323327587968. Its totient is φ = 43716298752.

The previous prime is 131111130209. The next prime is 131111130223. The reversal of 131111130220 is 22031111131.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 131111130194 and 131111130203.

It is not an unprimeable number, because it can be changed into a prime (131111130223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13634134 + ... + 13643746.

It is an arithmetic number, because the mean of its divisors is an integer number (3367995708).

Almost surely, 2^131111130220 is an apocalyptic number.

131111130220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131111130220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (161663793984).

131111130220 is an abundant number, since it is smaller than the sum of its proper divisors (192216457748).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131111130220 is a wasteful number, since it uses less digits than its factorization.

131111130220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12299 (or 12297 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 131111130220 its reverse (22031111131), we get a palindrome (153142241351).

The spelling of 131111130220 in words is "one hundred thirty-one billion, one hundred eleven million, one hundred thirty thousand, two hundred twenty".